1the capital of Syria. It is one of the most ancient cities in the world and is famous for its Great Mosque
road to Damascus
a situation in which someone experiences a sudden and complete change in their opinions or beliefs. The phrase is based on the story in the New Testament of the Bible, in which St Paul, who was a soldier trying to prevent Christianity from spreading, saw a blinding light and heard God's voice while he was travelling on the road to Damascus. He immediately became a Christian.
Definition from the Longman Dictionary of Contemporary English Advanced Learner's Dictionary.